Hi Steve,

Modellers in a club,who tinker with boats daily,would spot the problem in seconds.

Make of servo?

Make of receiver?

AM or FM ?

Type of receiver batteries?….How many?

If you use four new alkaline batteries for the receiver, does 3 good + 1 flat sort the problem?

Tom

Hi Steve,

Is 44 in the older brigade?

   I’ve repaired and serviced dozens of radio sets,acoms among them,but it seems from here that you haven’t even found what is faulty when you have the tools right at your disposal. You have other receivers,transmitters and crystals which should be cross compatible.(27 am generally are)

If you resort to asking another "for hands on help" it would be a good idea to have the boat "connected up " but switched off  and take the other boats or their RC sets with you.

So you’ve swapped servo/receiver to dycmo?….if it is 27 am and you have the receiver battery connected properly there should be no problems controlling it with another working tranny.

1. Older Acoms sets have a larger servo plug and the wiring sequence is + – sig which is opposite to Futaba,hitec and the later Acoms. …..You checked battery polarity first?
2. As I asked in the 17:47 post,what batteries did you use? Four new alkaline cells will stop an acoms servo working with some receivers.

Tom

Did you know ,If you have an oscilloscope you can diagnose many 27 A.M. transmitter faults with no direct connection?  Just set the scope to high frequency,high gain and short the probe to its earth or via a  33 kohm resistor load and place next to transmitter aerial.